| ??? 02/05/07 19:27 Read: times |
#132079 - umm. Responding to: ???'s previous message |
First of all, what role does the 18.432 MHz oscillator or crystal have in your system? You can't use a crystal of that frequency in a crystal oscillator configuration on the HMOS MCU, Its CMOS. My chip is an intel 80C51-BH. It has worked with it before. and, in order to get to a suitable baud rate for standard asynchronous communication, you'll have to use T2 I don't have T2. My is an 8051 compatible chip. It doesn't have the 8052 features. just to generate common baud rates with that speed even if your part does work at that rate, which it shouldn't. My previous system allowed me to work at a 19.2kbps baud rate with that crystal. and the same chips were used then. However, if you choose to use CMOS address latch... Actually, I'm going to leave my latch alone and go with 74HC573. The only pin that might be affected by CMOS gates is the PSEN pin, the clock, and the parallel port data. The logic works, but I have to work with what I have available to me. |
